NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
The Influence of Realistic Reynolds Numbers on Slat Noise SimulationsThe slat noise from the 30P/30N high-lift system has been computed using a computational fluid dynamics code in conjunction with a Ffowcs Williams-Hawkings solver. Varying the Reynolds number from 1.71 to 12.0 million based on the stowed chord resulted in slight changes in the radiated noise. Tonal features in the spectra were robust and evident for all Reynolds numbers and even when a spanwise flow was imposed. The general trends observed in near-field fluctuations were also similar for all the different Reynolds numbers. Experiments on simplified, subscale high-lift systems have exhibited noticeable dependencies on the Reynolds number and tripping, although primarily for tonal features rather than the broadband portion of the spectra. Either the 30P/30N model behaves differently, or the computational model is unable to capture these effects. Hence, the results underscore the need for more detailed measurements of the slat cove flow.
Document ID
20120010347
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Lockard, David P. (NASA Langley Research Center Hampton, VA, United States)
Choudhari, Meelan M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 26, 2013
Publication Date
June 4, 2012
Subject Category
Aerodynamics
Report/Patent Number
NF1676L-13773
Meeting Information
Meeting: 18th AIAA/CEAS Aeroacoustics Conference
Location: Colorado Springs, CO
Country: United States
Start Date: June 4, 2012
End Date: June 6, 2012
Sponsors: American Inst. of Aeronautics and Astronautics, National Oceanic and Atmospheric Administraion
Funding Number(s)
WBS: WBS 561581.02.08.03.45.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available